Application Of The Virtual3D Seismic Attribute In Hulin Basin’s Sedimentary Research

Seismic attributes are those which were deduced by a mathematical transformation from prestack orpoststack seismic data, used to characterize seismic wave geometry, kinematics, dynamics and statisticalcharacteristics, or physical quantities introduced by pure mathematical transformation. Seismic attributeanalysis technology is widely used in oil and gas exploration and development, it plays different roles atdifferent stages of exploration and promotes beneficially the process of oil and gas exploration anddevelopment.Computer has powerful computing power on the seismic digital signal, massive storage capacity,intuitive visualization techniques, which greatly promote the development of seismic attributes. The digitalrecording of seismic signals combines with the mathematical methods and computer technology organically,which makes the method in studying a wealth of information of seismic data became more effectively. Wecan extract hundreds of seismic attributes from seismic data, but not all of the seismic attributes aresensitive to sedimentary facies, so we need effectively optimize sensitive seismic attributes and conductmulti-attributes analysis to predict sedimentary facies.The paper first reviews the history of the development of seismic attributes, and discusses thephysical basis and corresponding algorithm of seismic attributes, and analyzes the variety of analyticalmethods and affected factors of the prediction result, also summaries the seismic attributes which aresensitive to sedimentary facies. Secondly, it briefly describes the research methods by establishing a virtualthree-dimensional work area to carry out attribute analysis in the two-dimensional work area, including thetechnical principles and workflow. We analyze the seismic reflection characteristics of the differentcombinatorial lithology combined with wells and seismic data in Hulin Basin. On the basis of a virtualthree-dimensional work area, we extract and analyze seismic attributes along the main purpose layer ofHu1, Hu2, Hu3section and select nine kinds of seismic attributes to predict sedimentary facies through the2D and3D multi-attribute intersection method. Combined with the known drilling data, we cluster these sensitive attributes, delineation of the cluster range to establish the corresponding relationship of clusteringand sedimentary subfacies, and improve the relationship by constantly modify the clustering characteristics,ultimately predictthe main purpose layer’s sedimentary facies, which provide a reliable basis for the basinevaluation and preferred area.In summary, we carry out and analysis the theoretical results of the seismic attributes to guide thepractical application, through the establishment of a virtual three-dimensional seismic work area, developthe seismic attributes in practical applications according the exploration degree of the study area, connectedwith the theoretical research of the seismic attributes and practical application closely, we explore a seismicattributes research method in early explored Hulin Basin. It has shown that seismic attribute technology isan effective tool to study sedimentary facies and effective technical means for basin evaluation and zoneoptimization in the early exploration basin.